Zenryaku, Watashi wo Koroshita Seijo e. Ji wo Modoshi Ai ni Ikimasu.

Aster was born into a ducal family and lived a life of comfort and privilege. But one day, her happy world shattered when her supposed best friend, the Saintess Shaula, betrayed her. Her beloved parents, her young sister, her trusted friends, even her fiancé, whom she loved dearly were all killed. Framed as the murderer of the second prince, Aster was executed. Yet when she awoke, she found herself three years in the past. Determined to protect those she holds dear, Aster vows to stop Saintess Shaura no matter the cost. Original Webtoon